They're literally just two SNPs apart, per my reply to the grandparent and link to Jesse Bloom's Twitter. What do you think excludes the possibility that those arose during human-to-human transmission, whether at the market or during cryptic spread before that?
No, we don’t know there were two separate crossover events. The two lineages are more likely to be the result of a minor mutation having occurred during human-human transmission, i.e. subsequent to the initial (single) crossover event.
No there were two distinct lineages in two separate crossover events, the market was just one of them.
Which is even worse for the lab-leak hypothesis.